Forging of Medical Certificate. What will you do?

One of the employee has been found to have forged her medical certificate, after verification was done with the clinic. Apparently she had included 1 more day of Medical Leave for herself (changing ‘5’ to ‘6’). After the evidence was presented, the staff finally admitted to it.

What I will do

Under the Penal Code of Singapore, forging for the purpose of cheating is punishable.
She forged her medical certificate so that she can enjoy a “free” day off. To me, that is more than cheating. That is also harming the interest of the organization for 1) the organization had incurred the cost of 1 day of salary and also 2) incurring unnecessary operational costs involved for covering her duties of work.

Simply anything that brushes with the law, Dismissal should be the only option.
I would go against the idea of informing the police as I felt that the losses the company had incurred are minimal, and we could take it as giving the employee a 2nd chance as well.